| /* |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| |
| /* |
| * |
| * (C) Copyright IBM Corp. 1998-2005 - All Rights Reserved |
| * |
| */ |
| |
| #include "LETypes.h" |
| #include "LayoutEngine.h" |
| #include "ThaiLayoutEngine.h" |
| #include "ScriptAndLanguageTags.h" |
| #include "LEGlyphStorage.h" |
| |
| #include "ThaiShaping.h" |
| |
| U_NAMESPACE_BEGIN |
| |
| UOBJECT_DEFINE_RTTI_IMPLEMENTATION(ThaiLayoutEngine) |
| |
| ThaiLayoutEngine::ThaiLayoutEngine(const LEFontInstance *fontInstance, le_int32 scriptCode, le_int32 languageCode, le_int32 typoFlags) |
| : LayoutEngine(fontInstance, scriptCode, languageCode, typoFlags) |
| { |
| fErrorChar = 0x25CC; |
| |
| // Figure out which presentation forms the font uses |
| if (fontInstance->canDisplay(0x0E64)) { |
| // WorldType uses reserved space in Thai block |
| fGlyphSet = 0; |
| } else if (fontInstance->canDisplay(0xF701)) { |
| // Microsoft corporate zone |
| fGlyphSet = 1; |
| |
| if (!fontInstance->canDisplay(fErrorChar)) { |
| fErrorChar = 0xF71B; |
| } |
| } else if (fontInstance->canDisplay(0xF885)) { |
| // Apple corporate zone |
| fGlyphSet = 2; |
| } else { |
| // no presentation forms in the font |
| fGlyphSet = 3; |
| } |
| } |
| |
| ThaiLayoutEngine::~ThaiLayoutEngine() |
| { |
| // nothing to do |
| } |
| |
| // Input: characters (0..max provided for context) |
| // Output: glyphs, char indices |
| // Returns: the glyph count |
| // NOTE: this assumes that ThaiShaping::compose will allocate the outChars array... |
| le_int32 ThaiLayoutEngine::computeGlyphs(const LEUnicode chars[], le_int32 offset, le_int32 count, le_int32 max, le_bool /*rightToLeft*/, LEGlyphStorage &glyphStorage, LEErrorCode &success) |
| { |
| if (LE_FAILURE(success)) { |
| return 0; |
| } |
| |
| if (chars == NULL || offset < 0 || count < 0 || max < 0 || offset >= max || offset + count > max) { |
| success = LE_ILLEGAL_ARGUMENT_ERROR; |
| return 0; |
| } |
| |
| LEUnicode *outChars; |
| le_int32 glyphCount; |
| |
| // This is enough room for the worst-case expansion |
| // (it says here...) |
| outChars = LE_NEW_ARRAY(LEUnicode, count * 2); |
| |
| if (outChars == NULL) { |
| success = LE_MEMORY_ALLOCATION_ERROR; |
| return 0; |
| } |
| |
| glyphStorage.allocateGlyphArray(count * 2, FALSE, success); |
| |
| if (LE_FAILURE(success)) { |
| LE_DELETE_ARRAY(outChars); |
| success = LE_MEMORY_ALLOCATION_ERROR; |
| return 0; |
| } |
| |
| glyphCount = ThaiShaping::compose(chars, offset, count, fGlyphSet, fErrorChar, outChars, glyphStorage); |
| mapCharsToGlyphs(outChars, 0, glyphCount, FALSE, FALSE, glyphStorage, success); |
| |
| LE_DELETE_ARRAY(outChars); |
| |
| glyphStorage.adoptGlyphCount(glyphCount); |
| return glyphCount; |
| } |
| |
| U_NAMESPACE_END |